/Engine/Plugins/Runtime/GameplayAbilities/Source/GameplayAbilities/Public/GameplayEffect.h
This is the main function that executes a GameplayEffect on Attributes and ActiveGameplayEffects
void ExecuteActiveEffectsFrom ( [FGameplayEffectSpec](API\Plugins\GameplayAbilities\FGameplayEffectSpec) & Spec, [FPredictionKey](API\Plugins\GameplayAbilities\FPredictionKey) PredictionKey )